Display screen with a graphical user interface



FIG. 1 is a front view of a display screen with a graphical user interface; and,

FIG. 2 is a front view of a second embodiment thereof.

The broken line showing of the display screen and text, and the broken lines shown within the graphical user interface form no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen with a graphical user interface, as shown and described. 